I am not sure is it going to work in Debian but in Gentoo you have too options:

(adjust those paths for Debian) 1) If you get errors about OpenCL programs unable to find libOpenCL.so, simply create a symlink from /opt/amd-app-sdk/lib/x86_64[or32]libOpenCL.so to /usr/lib64[or32]/libOpenCL.so. Do the same from /opt/amd-app-sdk/lib/x86_64[or32]/libOpenCL.so.1 to /usr/lib64[or32]/libOpenCL.so.1

2) Or you can use: eselect

Code:

$ eselect opencl list

Available OpenCL implementations: [1] ati

$ eselect opencl set 1

While reading what I wrote, use the most friendliest and relaxing voice in your head. BTW, Things in BTC bubble universes are getting ugly....

If I get it right, I have installed opencl in the nvidia version and need to overwrite it with the ati version.So I need to overwrite libOpenCL.so and libOpenCL.so.1 with the ones from ati-stream-sdk-v2.2-lnx3. But libOpenCL.so.1 is missing there?

If I get it right, I have installed opencl in the nvidia version and need to overwrite it with the ati version.So I need to overwrite libOpenCL.so and libOpenCL.so.1 with the ones from ati-stream-sdk-v2.2-lnx3. But libOpenCL.so.1 is missing there?

Did the error change? Do you have your ATI platform files in /etc/OpenCL/vendors/? What is the output of these: